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+/****************************************************************************
+**
+** Implementation of TQIconSet class
+**
+** Created : 980318
+**
+** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "tqiconset.h"
+
+#ifndef TQT_NO_ICONSET
+
+#include "tqapplication.h"
+#include "tqbitmap.h"
+#include "tqcleanuphandler.h"
+#include "tqimage.h"
+#include "tqpainter.h"
+
+enum { NumSizes = 2, NumModes = 3, NumStates = 2 };
+
+static TQIconFactory *defaultFac = 0;
+static TQSingleCleanupHandler<TQIconFactory> q_cleanup_icon_factory;
+
+static short widths[2] = { 22, 32 };
+static short heights[2] = { 22, 32 };
+
+enum TQIconSetIconOrigin {
+    SuppliedFileName,   // 'fileName' tqcontains the name of the file
+    SuppliedPixmap,     // 'pixmap' is a pointer to the user-supplied pixmap
+    Manufactured,       // 'pixmap' is a factory-generated pixmap (or 0)
+    Generated           // 'pixmap' is a TQIconSet-generated pixmap (or 0)
+};
+
+struct TQIconSetIcon
+{
+    TQIconSetIconOrigin origin;
+    union {
+	TQString *fileName;
+	TQPixmap *pixmap;
+    };
+
+    TQIconSetIcon() : origin( Generated ) { pixmap = 0; }
+    TQIconSetIcon( const TQIconSetIcon& other )
+	: origin( Generated ) {
+	pixmap = 0;
+	operator=( other );
+    }
+    ~TQIconSetIcon() {
+	if ( origin == SuppliedFileName ) {
+	    delete fileName;
+	} else {
+	    delete pixmap;
+	}
+    }
+
+    TQIconSetIcon& operator=( const TQIconSetIcon& other );
+
+    void clearCached() {
+	if ( pixmap && (origin == Manufactured || origin == Generated) ) {
+	    origin = Generated;
+	    delete pixmap;
+	    pixmap = 0;
+	}
+    }
+};
+
+TQIconSetIcon& TQIconSetIcon::operator=( const TQIconSetIcon& other )
+{
+    TQPixmap *oldPixmap = 0;
+    TQString *oldFileName = 0;
+    if ( origin == SuppliedFileName ) {
+	oldFileName = fileName;
+    } else {
+	oldPixmap = pixmap;
+    }
+
+    origin = other.origin;
+    if ( other.origin == SuppliedFileName ) {
+	fileName = new TQString( *other.fileName );
+    } else {
+	if ( other.pixmap ) {
+	    pixmap = new TQPixmap( *other.pixmap );
+	} else {
+	    pixmap = 0;
+	}
+    }
+    delete oldPixmap;
+    delete oldFileName;
+    return *this;
+}
+
+class TQIconSetPrivate : public TQShared
+{
+public:
+    TQIconSetIcon icons[NumSizes][NumModes][NumStates];
+    TQPixmap defaultPix;
+    TQIconFactory *factory;
+
+    TQIconSetPrivate() : factory( 0 ) { }
+    TQIconSetPrivate( const TQIconSetPrivate& other ) : TQShared() {
+	count = 1;
+	for ( int i = 0; i < NumSizes; i++ ) {
+	    for ( int j = 0; j < NumModes; j++ ) {
+		for ( int k = 0; k < NumStates; k++ ) {
+		    icons[i][j][k] = other.icons[i][j][k];
+		}
+	    }
+	}
+	defaultPix = other.defaultPix;
+	factory = other.factory;
+	if ( factory )
+	    factory->ref();
+    }
+    ~TQIconSetPrivate() {
+	setFactory( 0 );
+    }
+
+    TQIconSetIcon *icon( const TQIconSet *iconSet, TQIconSet::Size size,
+			TQIconSet::Mode mode, TQIconSet::State state );
+    void setFactory( TQIconFactory *newFactory ) {
+	if ( newFactory )
+	    newFactory->ref();
+	if ( factory && factory->deref() && factory->autoDelete() )
+	    delete factory;
+	factory = newFactory;
+    }
+
+    TQ_DUMMY_COMPARISON_OPERATOR( TQIconSetPrivate )
+};
+
+TQIconSetIcon *TQIconSetPrivate::icon( const TQIconSet *iconSet,
+				     TQIconSet::Size size, TQIconSet::Mode mode,
+				     TQIconSet::State state )
+{
+    TQIconSetIcon *ik = &icons[(int) size - 1][(int) mode][(int) state];
+
+    if ( iconSet ) {
+	if ( ik->origin == SuppliedFileName ) {
+	    TQPixmap *newPixmap = new TQPixmap( *ik->fileName );
+	    delete ik->fileName;
+
+	    if ( newPixmap->isNull() ) {
+		delete newPixmap;
+		ik->origin = Generated;
+		ik->pixmap = 0;
+	    } else {
+		ik->origin = SuppliedPixmap;
+		ik->pixmap = newPixmap;
+	    }
+	}
+
+	if ( !ik->pixmap && ik->origin == Generated ) {
+	    TQIconFactory *f = factory;
+	    if ( !f )
+		f = defaultFac;
+
+	    if ( f ) {
+		/*
+		  We set 'origin' to Manufactured half a second too
+		  early to prevent recursive calls to this function.
+		  (This can happen if createPixmap() calls
+		  TQIconSet::pixmap(), which in turn calls this
+		  function.)
+		*/
+		ik->origin = Manufactured;
+		ik->pixmap = f->createPixmap( *iconSet, size, mode, state );
+		if ( !ik->pixmap )
+		    ik->origin = Generated;
+	    }
+	}
+    }
+    return ik;
+}
+
+/*! \class TQIconSet
+
+  \brief The TQIconSet class provides a set of icons with different
+  styles and sizes.
+
+  \ingroup graphics
+  \ingroup images
+  \ingroup shared
+  \mainclass
+
+  A TQIconSet can generate smaller, larger, active, and disabled pixmaps
+  from the set of icons it is given. Such pixmaps are used by
+  TQToolButton, TQHeader, TQPopupMenu, etc. to show an icon representing a
+  particular action.
+
+  The simplest use of TQIconSet is to create one from a TQPixmap and then
+  use it, allowing TQt to work out all the required icon styles and
+  sizes. For example:
+
+  \code
+    TQToolButton *but = new TQToolButton( TQIconSet( TQPixmap("open.xpm") ), ... );
+  \endcode
+
+  Using whichever pixmaps you specify as a base, TQIconSet provides a
+  set of six icons, each with a \l Size and a \l Mode: Small Normal,
+  Small Disabled, Small Active, Large Normal, Large Disabled, and
+  Large Active.
+
+  An additional set of six icons can be provided for widgets that have
+  an "On" or "Off" state, like checkable menu items or toggleable
+  toolbuttons. If you provide pixmaps for the "On" state, but not for
+  the "Off" state, the TQIconSet will provide the "Off" pixmaps. You may
+  specify icons for both states in you wish.
+
+  You can set any of the icons using setPixmap().
+
+  When you retrieve a pixmap using pixmap(Size, Mode, State),
+  TQIconSet will return the icon that has been set or previously
+  generated for that size, mode and state combination. If none is
+  available, TQIconSet will ask the icon factory. If the icon factory
+  cannot provide any (the default), TQIconSet generates a pixmap based
+  on the pixmaps it has been given and returns it.
+
+  The \c Disabled appearance is computed using an algorithm that
+  produces results very similar to those used in Microsoft Windows
+  95. The \c Active appearance is identical to the \c Normal
+  appearance unless you use setPixmap() to set it to something
+  special.
+
+  When scaling icons, TQIconSet uses \link TQImage::smoothScale()
+  smooth scaling\endlink, which can partially blend the color component
+  of pixmaps.  If the results look poor, the best solution
+  is to supply pixmaps in both large and small sizes.
+
+  You can use the static function setIconSize() to set the preferred
+  size of the generated large/small icons. The default small size is
+  22 x 22, while the default large size is 32 x 32. These sizes only
+  affect generated icons.
+
+  The isGenerated() function returns TRUE if an icon was generated by
+  TQIconSet or by a factory; clearGenerated() clears all cached
+  pixmaps.
+
+  \section1 Making Classes that Use TQIconSet
+
+  If you write your own widgets that have an option to set a small
+  pixmap, consider allowing a TQIconSet to be set for that pixmap.  The
+  TQt class TQToolButton is an example of such a widget.
+
+  Provide a method to set a TQIconSet, and when you draw the icon, choose
+  whichever icon is appropriate for the current state of your widget.
+  For example:
+  \code
+    void MyWidget::drawIcon( TQPainter* p, TQPoint pos )
+    {
+	p->drawPixmap( pos, icons->pixmap(
+				TQIconSet::Small,
+				isEnabled() ? TQIconSet::Normal :
+					      TQIconSet::Disabled,
+				isEnabled() ? TQIconSet::On :
+					      TQIconSet::Off));
+    }
+  \endcode
+
+  You might also make use of the \c Active mode, perhaps making your
+  widget \c Active when the mouse is over the widget (see \l
+  TQWidget::enterEvent()), while the mouse is pressed pending the
+  release that will activate the function, or when it is the currently
+  selected item. If the widget can be toggled, the "On" mode might be
+  used to draw a different icon.
+
+  \img iconset.png TQIconSet
+
+  \sa TQIconFactory TQPixmap TQMainWindow::setUsesBigPixmaps()
+      \link guibooks.html#fowler GUI Design Handbook: Iconic Label \endlink
+*/
+
+
+/*!
+  \enum TQIconSet::Size
+
+  This enum type describes the size at which a pixmap is intended to be
+  used.
+  The currently defined sizes are:
+
+    \value Automatic  The size of the pixmap is determined from its
+		      pixel size. This is a useful default.
+    \value Small  The pixmap is the smaller of two.
+    \value Large  The pixmap is the larger of two.
+
+  If a Small pixmap is not set by TQIconSet::setPixmap(), the Large
+  pixmap will be automatically scaled down to the size of a small pixmap
+  to generate the Small pixmap when required.  Similarly, a Small pixmap
+  will be automatically scaled up to generate a Large pixmap. The
+  preferred sizes for large/small generated icons can be set using
+  setIconSize().
+
+  \sa setIconSize() iconSize() setPixmap() pixmap() TQMainWindow::setUsesBigPixmaps()
+*/
+
+/*!
+  \enum TQIconSet::Mode
+
+  This enum type describes the mode for which a pixmap is intended to be
+  used.
+  The currently defined modes are:
+
+    \value Normal
+	 Display the pixmap when the user is
+	not interacting with the icon, but the
+	functionality represented by the icon is available.
+    \value Disabled
+	 Display the pixmap when the
+	functionality represented by the icon is not available.
+    \value Active
+	 Display the pixmap when the
+	functionality represented by the icon is available and
+	the user is interacting with the icon, for example, moving the
+	mouse over it or clicking it.
+*/
+
+/*!
+  \enum TQIconSet::State
+
+  This enum describes the state for which a pixmap is intended to be
+  used. The \e state can be:
+
+  \value Off  Display the pixmap when the widget is in an "off" state
+  \value On  Display the pixmap when the widget is in an "on" state
+
+  \sa setPixmap() pixmap()
+*/
+
+/*!
+  Constructs a null icon set.
+
+  \sa setPixmap(), reset()
+*/
+TQIconSet::TQIconSet()
+    : d( 0 )
+{
+}
+
+/*!
+  Constructs an icon set for which the Normal pixmap is \a pixmap,
+  which is assumed to be of size \a size.
+
+  The default for \a size is \c Automatic, which means that TQIconSet
+  will determine whether the pixmap is Small or Large from its pixel
+  size. Pixmaps less than the width of a small generated icon are
+  considered to be Small. You can use setIconSize() to set the
+  preferred size of a generated icon.
+
+  \sa setIconSize() reset()
+*/
+TQIconSet::TQIconSet( const TQPixmap& pixmap, Size size )
+    : d( 0 )
+{
+    reset( pixmap, size );
+}
+
+/*!  Creates an iconset which uses the pixmap \a smallPix for for
+  displaying a small icon, and the pixmap \a largePix for displaying a
+  large icon.
+*/
+TQIconSet::TQIconSet( const TQPixmap& smallPix, const TQPixmap& largePix )
+    : d( 0 )
+{
+    reset( smallPix, Small );
+    reset( largePix, Large );
+}
+
+/*!
+  Constructs a copy of \a other. This is very fast.
+*/
+TQIconSet::TQIconSet( const TQIconSet& other )
+    : d( other.d )
+{
+    if ( d )
+	d->ref();
+}
+
+/*!
+  Destroys the icon set and frees any allocated resources.
+*/
+TQIconSet::~TQIconSet()
+{
+    if ( d && d->deref() )
+	delete d;
+}
+
+/*!
+  Sets this icon set to use pixmap \a pixmap for the Normal pixmap,
+  assuming it to be of size \a size.
+
+  This is equivalent to assigning TQIconSet(\a pixmap, \a size) to this
+  icon set.
+
+  This function does nothing if \a pixmap is a null pixmap.
+*/
+void TQIconSet::reset( const TQPixmap& pixmap, Size size )
+{
+    if ( pixmap.isNull() )
+	return;
+
+    detach();
+    normalize( size, pixmap.size() );
+    setPixmap( pixmap, size, Normal );
+    d->defaultPix = pixmap;
+    d->setFactory( 0 );
+}
+
+/*!
+  Sets this icon set to provide pixmap \a pixmap for size \a size, mode \a
+  mode and state \a state. The icon set may also use \a pixmap for
+  generating other pixmaps if they are not explicitly set.
+
+  The \a size can be one of Automatic, Large or Small.  If Automatic is
+  used, TQIconSet will determine if the pixmap is Small or Large from its
+  pixel size.
+
+  Pixmaps less than the width of a small generated icon are
+  considered to be Small. You can use setIconSize() to set the preferred
+  size of a generated icon.
+
+  This function does nothing if \a pixmap is a null pixmap.
+
+  \sa reset()
+*/
+void TQIconSet::setPixmap( const TQPixmap& pixmap, Size size, Mode mode,
+			  State state )
+{
+    if ( pixmap.isNull() )
+	return;
+
+    normalize( size, pixmap.size() );
+
+    detach();
+    clearGenerated();
+
+    TQIconSetIcon *icon = d->icon( 0, size, mode, state );
+    if ( icon->origin == SuppliedFileName ) {
+	delete icon->fileName;
+	icon->pixmap = 0;
+    }
+    icon->origin = SuppliedPixmap;
+    if ( icon->pixmap == 0 ) {
+	icon->pixmap = new TQPixmap( pixmap );
+    } else {
+	*icon->pixmap = pixmap;
+    }
+}
+
+/*!
+  \overload
+
+  The pixmap is loaded from \a fileName when it becomes necessary.
+*/
+void TQIconSet::setPixmap( const TQString& fileName, Size size, Mode mode,
+			  State state )
+{
+    if ( size == Automatic ) {
+	setPixmap( TQPixmap(fileName), size, mode, state );
+    } else {
+	detach();
+	clearGenerated();
+
+	TQIconSetIcon *icon = d->icon( 0, size, mode, state );
+	if ( icon->origin == SuppliedFileName ) {
+	    *icon->fileName = fileName;
+	} else {
+	    delete icon->pixmap;
+	    icon->fileName = new TQString( fileName );
+	    icon->origin = SuppliedFileName;
+	}
+    }
+}
+
+/*!
+  Returns a pixmap with size \a size, mode \a mode and state \a
+  state, generating one if necessary. Generated pixmaps are cached.
+*/
+TQPixmap TQIconSet::pixmap( Size size, Mode mode, State state ) const
+{
+    if ( !d ) {
+	if ( defaultFac ) {
+	    TQIconSet *that = (TQIconSet *) this;
+	    that->detach();
+	} else {
+	    return TQPixmap();
+	}
+    }
+
+    if ( size == Automatic )
+	size = Small;
+
+    TQIconSetIcon *icon = d->icon( this, size, mode, state );
+    if ( icon->pixmap )
+	return *icon->pixmap;
+    if ( icon->origin == Manufactured ) {
+	/*
+	  This can only occur during the half a second's time when
+	  the icon is being manufactured. If TQIconFactory somehow
+	  tries to access the pixmap it's supposed to be creating, it
+	  will get a null pixmap.
+	*/
+	return TQPixmap();
+    }
+
+    if ( mode == Active )
+	return pixmap( size, Normal, state );
+
+    Size otherSize = ( size == Large ) ? Small : Large;
+    TQIconSetIcon *otherSizeIcon = d->icon( this, otherSize, mode, state );
+
+    if ( state == Off ) {
+	if ( mode == Disabled &&
+	     d->icon(this, size, Normal, Off)->origin != Generated ) {
+	    icon->pixmap = createDisabled( size, Off );
+	} else if ( otherSizeIcon->origin != Generated ) {
+	    icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
+	} else if ( mode == Disabled ) {
+	    icon->pixmap = createDisabled( size, Off );
+	} else if ( !d->defaultPix.isNull() ) {
+	    icon->pixmap = new TQPixmap( d->defaultPix );
+	} else {
+	    /*
+	      No icons are available for { TRUE, Normal, Off } and
+	      { FALSE, Normal, Off }. Try the other 10 combinaisons,
+	      best ones first.
+	    */
+	    const int N = 10;
+	    static const struct {
+		bool sameSize;
+		Mode mode;
+		State state;
+	    } tryList[N] = {
+		{ TRUE, Active, Off },
+		{ TRUE, Normal, On },
+		{ TRUE, Active, On },
+		{ FALSE, Active, Off },
+		{ FALSE, Normal, On },
+		{ FALSE, Active, On },
+		{ TRUE, Disabled, Off },
+		{ TRUE, Disabled, On },
+		{ FALSE, Disabled, Off },
+		{ FALSE, Disabled, On }
+	    };
+
+	    for ( int i = 0; i < N; i++ ) {
+		bool sameSize = tryList[i].sameSize;
+		TQIconSetIcon *tryIcon =
+			d->icon( this, sameSize ? size : otherSize,
+				 tryList[i].mode, tryList[i].state );
+		if ( tryIcon->origin != Generated ) {
+		    if ( sameSize ) {
+			if ( tryIcon->pixmap )
+			    icon->pixmap = new TQPixmap( *tryIcon->pixmap );
+		    } else {
+			icon->pixmap = createScaled( size, tryIcon->pixmap );
+		    }
+		    break;
+		}
+	    }
+	}
+    } else { /* ( state == On ) */
+	if ( mode == Normal ) {
+	    if ( otherSizeIcon->origin != Generated ) {
+		icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
+	    } else {
+		icon->pixmap = new TQPixmap( pixmap(size, mode, Off) );
+	    }
+	} else { /* ( mode == Disabled ) */
+	    TQIconSetIcon *offIcon = d->icon( this, size, mode, Off );
+	    TQIconSetIcon *otherSizeOffIcon = d->icon( this, otherSize, mode,
+						      Off );
+
+	    if ( offIcon->origin != Generated ) {
+		if ( offIcon->pixmap )
+		    icon->pixmap = new TQPixmap( *offIcon->pixmap );
+	    } else if ( d->icon(this, size, Normal, On)->origin != Generated ) {
+		icon->pixmap = createDisabled( size, On );
+	    } else if ( otherSizeIcon->origin != Generated ) {
+		icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
+	    } else if ( otherSizeOffIcon->origin != Generated ) {
+		icon->pixmap = createScaled( size, otherSizeOffIcon->pixmap );
+	    } else {
+		icon->pixmap = createDisabled( size, On );
+	    }
+	}
+    }
+    if ( icon->pixmap ) {
+	return *icon->pixmap;
+    } else {
+	return TQPixmap();
+    }
+}
+
+/*! \overload
+    \obsolete
+
+  This is the same as pixmap(\a size, \a enabled, \a state).
+*/
+TQPixmap TQIconSet::pixmap( Size size, bool enabled, State state ) const
+{
+    return pixmap( size, enabled ? Normal : Disabled, state );
+}
+
+/*!
+  \overload
+
+  Returns the pixmap originally provided to the constructor or to
+  reset(). This is the Normal pixmap of unspecified Size.
+
+  \sa reset()
+*/
+TQPixmap TQIconSet::pixmap() const
+{
+    if ( !d )
+	return TQPixmap();
+    return d->defaultPix;
+}
+
+/*!
+  Returns TRUE if the pixmap with size \a size, mode \a mode and
+  state \a state is generated from other pixmaps; otherwise returns
+  FALSE.
+
+  A pixmap obtained from a TQIconFactory is considered non-generated.
+*/
+bool TQIconSet::isGenerated( Size size, Mode mode, State state ) const
+{
+    if ( !d )
+	return TRUE;
+    return d->icon( this, size, mode, state )->origin == Generated;
+}
+
+/*!
+    Clears all cached pixmaps, including those obtained from an
+    eventual TQIconFactory.
+*/
+void TQIconSet::clearGenerated()
+{
+    if ( !d )
+	return;
+
+    for ( int i = 0; i < NumSizes; i++ ) {
+	for ( int j = 0; j < NumModes; j++ ) {
+	    for ( int k = 0; k < NumStates; k++ ) {
+		d->icons[i][j][k].clearCached();
+	    }
+	}
+    }
+}
+
+/*!
+    Installs \a factory as the icon factory for this iconset. The
+    icon factory is used to generates pixmaps not set by the user.
+
+    If no icon factory is installed, TQIconFactory::defaultFactory()
+    is used.
+*/
+void TQIconSet::installIconFactory( TQIconFactory *factory )
+{
+    detach();
+    d->setFactory( factory );
+}
+
+/*!
+  Returns TRUE if the icon set is empty; otherwise returns FALSE.
+*/
+bool TQIconSet::isNull() const
+{
+    return !d;
+}
+
+/*!
+  Detaches this icon set from others with which it may share data.
+
+  You will never need to call this function; other TQIconSet functions
+  call it as necessary.
+*/
+void TQIconSet::detach()
+{
+    if ( !d ) {
+	d = new TQIconSetPrivate;
+	return;
+    }
+    if ( d->count != 1 ) {
+	d->deref();
+	d = new TQIconSetPrivate( *d );
+    }
+}
+
+/*!
+  Assigns \a other to this icon set and returns a reference to this
+  icon set.
+
+  \sa detach()
+*/
+TQIconSet& TQIconSet::operator=( const TQIconSet& other )
+{
+    if ( other.d )
+	other.d->ref();
+
+    if ( d && d->deref() )
+	delete d;
+    d = other.d;
+    return *this;
+}
+
+/*!
+  Set the preferred size for all small or large icons that are
+  generated after this call. If \a which is Small, sets the preferred
+  size of small generated icons to \a size. Similarly, if \a which is
+  Large, sets the preferred size of large generated icons to \a size.
+
+  Note that cached icons will not be regenerated, so it is recommended
+  that you set the preferred icon sizes before generating any icon sets.
+  Also note that the preferred icon sizes will be ignored for icon sets
+  that have been created using both small and large pixmaps.
+
+  \sa iconSize()
+*/
+void TQIconSet::setIconSize( Size which, const TQSize& size )
+{
+    widths[(int) which - 1] = size.width();
+    heights[(int) which - 1] = size.height();
+}
+
+/*!
+    If \a which is Small, returns the preferred size of a small
+    generated icon; if \a which is Large, returns the preferred size
+    of a large generated icon.
+
+  \sa setIconSize()
+*/
+const TQSize& TQIconSet::iconSize( Size which )
+{
+    // ### tqreplace 'const TQSize&' with TQSize in TQt 4 and simply this code
+    static TQSize size;
+    size = TQSize( widths[(int) which - 1], heights[(int) which - 1] );
+    return size;
+}
+
+void TQIconSet::normalize( Size& which, const TQSize& pixSize )
+{
+    if ( which == Automatic )
+	which = pixSize.width() > iconSize( Small ).width() ? Large : Small;
+}
+
+/*!
+    Returns a new pixmap that is a copy of \a suppliedPix, scaled to
+    the icon size \a size.
+*/
+TQPixmap *TQIconSet::createScaled( Size size, const TQPixmap *suppliedPix ) const
+{
+    if ( !suppliedPix || suppliedPix->isNull() )
+	return 0;
+
+    TQImage img = suppliedPix->convertToImage();
+    TQSize imgSize = iconSize( size );
+    if ( size == Small ) {
+	imgSize = imgSize.boundedTo( img.size() );
+    } else {
+	imgSize = imgSize.expandedTo( img.size() );
+    }
+    img = img.smoothScale( imgSize );
+
+    TQPixmap *pixmap = new TQPixmap( img );
+    if ( !pixmap->tqmask() ) {
+	TQBitmap tqmask;
+	tqmask.convertFromImage( img.createHeuristicMask(),
+			       TQt::MonoOnly | TQt::ThresholdDither );
+	pixmap->setMask( tqmask );
+    }
+    return pixmap;
+}
+
+/*!
+    Returns a new pixmap that has a 'disabled' look, taking as its
+    base the iconset's icon with size \a size and state \a state.
+*/
+TQPixmap *TQIconSet::createDisabled( Size size, State state ) const
+{
+    TQPixmap normalPix = pixmap( size, Normal, state );
+    if ( normalPix.isNull() )
+	return 0;
+
+    TQImage img;
+    TQPixmap *pixmap = 0;
+    TQBitmap normalMask;
+    if ( normalPix.tqmask() ) {
+	normalMask = *normalPix.tqmask();
+    } else {
+	img = normalPix.convertToImage();
+	normalMask.convertFromImage( img.createHeuristicMask(),
+				     TQt::MonoOnly | TQt::ThresholdDither );
+    }
+    
+    pixmap = new TQPixmap( normalPix.width() + 1,
+			  normalPix.height() + 1 );
+    const TQColorGroup &dis = TQApplication::tqpalette().disabled();
+    pixmap->fill( dis.background() );
+
+    TQPainter painter;
+    painter.begin( pixmap );
+    painter.setPen( dis.base() );
+    painter.drawPixmap( 1, 1, normalMask );
+    painter.setPen( dis.foreground() );
+    painter.drawPixmap( 0, 0, normalMask );
+    painter.end();
+
+    if ( !normalMask.tqmask() )
+	normalMask.setMask( normalMask );
+
+    TQBitmap tqmask( pixmap->size() );
+    tqmask.fill( TQt::color0 );
+    painter.begin( &tqmask );
+    painter.drawPixmap( 0, 0, normalMask );
+    painter.drawPixmap( 1, 1, normalMask );
+    painter.end();
+    pixmap->setMask( tqmask );
+    return pixmap;
+}
+
+/*! \class TQIconFactory
+  \ingroup advanced
+  \brief The TQIconFactory class is used to create pixmaps for a TQIconSet.
+
+  By reimplementing createPixmap(), you can override TQIconSet's
+  default algorithm for computing pixmaps not supplied by the user.
+
+  Call setAutoDelete(TRUE) if you want the factory to automatically
+  delete itself when it is no longer needed by TQIconSet.
+
+  \sa TQIconSet
+*/
+
+/*!
+  Constructs an icon factory.
+*/
+TQIconFactory::TQIconFactory()
+    : autoDel( 0 )
+{
+    count = 0;
+}
+
+/*!
+  Destroys the object and frees any allocated resources.
+*/
+TQIconFactory::~TQIconFactory()
+{
+}
+
+/*!
+  Ceates a pixmap for \a iconSet with a certain \a size, \a mode, and
+  \a state. Returns 0 if the default TQIconSet algorithm should be
+  used to create a pixmap that wasn't supplied by the user.
+
+  It is the caller's responsibility to delete the returned pixmap.
+
+  The default implementation always returns 0.
+*/
+TQPixmap *TQIconFactory::createPixmap( const TQIconSet& /* iconSet */,
+				     TQIconSet::Size /* size */,
+				     TQIconSet::Mode /* mode */,
+				     TQIconSet::State /* state */ )
+{
+    return 0;
+}
+
+/*!
+    \fn void TQIconFactory::setAutoDelete( bool autoDelete )
+
+    If \a autoDelete is TRUE, sets the icon factory to automatically
+    delete itself when it is no longer referenced by any TQIconSet and
+    isn't the default factory. If \a autoDelete is FALSE (the default)
+    auto-deletion is disabled.
+
+    \sa autoDelete(), defaultFactory()
+*/
+
+/*!
+  \fn bool TQIconFactory::autoDelete() const
+
+  Returns TRUE if auto-deletion is enabled; otherwise returns FALSE.
+
+  \sa setAutoDelete()
+*/
+
+/*!
+  Returns the default icon factory.
+
+  \sa installDefaultFactory()
+*/
+TQIconFactory *TQIconFactory::defaultFactory()
+{
+    if ( !defaultFac ) {
+	defaultFac = new TQIconFactory;
+	defaultFac->setAutoDelete( TRUE );
+	defaultFac->ref();
+	q_cleanup_icon_factory.set( &defaultFac );
+    }
+    return defaultFac;
+}
+
+/*!
+  Replaces the default icon factory with \a factory.
+*/
+void TQIconFactory::installDefaultFactory( TQIconFactory *factory )
+{
+    if ( !factory )
+	return;
+
+    factory->ref();
+    if ( defaultFac && defaultFac->deref() && defaultFac->autoDelete() )
+	delete defaultFac;
+    defaultFac = factory;
+    q_cleanup_icon_factory.set( &defaultFac );
+}
+
+#endif // TQT_NO_ICONSET